关于c:选择排序

#include <stdio.h>

void dispaly(int* arr, int length)
{
    for (int i = 0; i < length; ++i)
    {
        printf("%d%s", arr[i], i == length - 1 ? " " : ", ");
    }

    printf("\n");
}

void swap(int* a, int* b)
{
    int temp = *a;
    *a = *b;
    *b = temp;
}

void select(int* arr, int length)
{
    for (int i = 0; i < length - 1; ++i)
    {
        int minIndex = i;
        for (int j = i + 1; j < length; ++j)
        {
            if (arr[j] < arr[minIndex]) {
                minIndex = j;
            }
        }
        
        if (i == minIndex) {
            continue;
        }

        swap(&arr[i], &arr[minIndex]);
    }
}

int main(int argc, char const *argv[])
{
    int arr[] = {3, 4, 2, 6, 7, 1, 7, 7, 21, 87, 22, 66, 11};

    int length = sizeof(arr) / sizeof(int);

    dispaly(arr, length);

    select(arr, length);

    dispaly(arr, length);

    return 0;
}